tip, cu - connect to a remote system

     tip [-v] [-speed] system-name
     tip [-v] [-speed] phone-number
     cu phone-number [-ts] [speed] [-a acu] [-l line] [-#]

     Tip and cu establish a full-duplex connection to another machine,  giving
     the  appearance  of  being logged in directly on the remote cpu.  It goes
     without saying that you must have a login on the machine (or  equivalent)
     to  which  you  wish to connect.  The preferred interface is tip.  The cu
     interface is included for those people  attached  to  the  ``call  UNIX''
     command of version 7.  This manual page describes only tip.

     Typed characters are normally transmitted directly to the remote  machine
     (which  does  the echoing as well).  A tilde (`~') appearing as the first
     character of a line is an escape signal; the following are recognized:

     ~^D ~.    Drop the connection and exit (you may still be logged in on the
               remote machine).

     ~c  [name]
               Change directory to name (no argument implies  change  to  your
               home directory).

     ~!        Escape to a shell (exiting the shell will return you to tip).

     ~>        Copy file from local to remote.  Tip prompts for the name of  a
               local file to transmit.

     ~<        Copy file from remote to local.  Tip prompts first for the name
               of  the  file  to be sent, then for a command to be executed on
               the remote machine.

     ~p from [ to ]
               Send a file to a remote UNIX host.  The put command causes  the
               remote  UNIX  system  to run the command string ``cat > 'to''',
               while tip sends it the ``from'' file.  If the ``to'' file isn't
               specified  the  ``from''  file  name  is used.  This command is
               actually a UNIX specific version of the ``~>'' command.

     ~t from [ to ]
               Take a file from a remote UNIX host. As in the put command  the
               ``to''  file  defaults  to  the  ``from'' file name if it isn't
               specified. The remote host executes the  command  string  ``cat
               'from';echo ^A'' to send the file to tip.

     ~|        Pipe the output from a remote command to a local UNIX  process.
               The  command  string sent to the local UNIX system is processed
               by the shell.

     ~$        Pipe the output from a local UNIX process to the  remote  host.
               The  command  string sent to the local UNIX system is processed
               by the shell.

     ~#        Send a BREAK to the remote  system.  For  systems  which  don't
               support  the  necessary  ioctl call the break is simulated by a
               sequence of line speed changes and DEL characters.

     ~s        Set a variable (see the discussion below).

     ~^Z       Stop tip (only available with job control).

     ~^Y       Stop only the ``local side'' of tip (only  available  with  job
               control);  the  ``remote  side'' of tip, the side that displays
               output from the remote host, is left running.

     ~?        Get a summary of the tilde escapes

     Tip uses the file /etc/remote to find how to reach  a  particular  system
     and  to find out how it should operate while talking to the system; refer
     to remote(5) for a full description.  Each system has a default baud rate
     with which to establish a connection.  If this value is not suitable, the
     baud rate to be used may be specified on the  command  line,  e.g.  ``tip
     -300 mds''.

     When tip establishes a connection it sends out a  connection  message  to
     the remote system; the default value, if any, is defined in /etc/remote.

     When tip prompts for an argument (e.g. during setup of a  file  transfer)
     the line typed may be edited with the standard erase and kill characters.
     A null line in response to a prompt, or  an  interrupt,  will  abort  the
     dialogue and return you to the remote machine.

     Tip guards against multiple  users  connecting  to  a  remote  system  by
     opening  modems and terminal lines with exclusive access, and by honoring
     the locking protocol used by uucp(1).

     During file transfers tip provides a running count of the number of lines
     transferred.   When  using  the  ~>  and ~< commands, the ``eofread'' and
     ``eofwrite'' variables are used to recognize  end-of-file  when  reading,
     and  specify  end-of-file  when  writing  (see  below).   File  transfers
     normally depend on tandem mode for flow control.  If  the  remote  system
     does  not  support  tandem mode, ``echocheck'' may be set to indicate tip
     should synchronize with the remote system on the echo of each transmitted
     When tip must dial a phone number to connect to a system  it  will  print
     various  messages indicating its actions.  Tip supports the DEC DN-11 and
     Racal-Vadic 831 auto-call-units; the DEC  DF02  and  DF03,  Ventel  212+,
     Racal-Vadic 3451, and Bizcomp 1031 and 1032 integral call unit/modems.


     Tip maintains a set of variables which control its  operation.   Some  of
     these  variable  are read-only to normal users (root is allowed to change
     anything of interest).  Variables may be displayed and  set  through  the
     ``s''  escape.   The  syntax  for  variables is patterned after vi(1) and
     Mail(1).  Supplying ``all'' as an argument to the  set  command  displays
     all  variables readable by the user.  Alternatively, the user may request
     display of a particular variable by attaching a  `?'  to  the  end.   For
     example ``escape?''  displays the current escape character.

     Variables are numeric, string, character,  or  boolean  values.   Boolean
     variables  are  set merely by specifying their name; they may be reset by
     prepending  a  `!'  to  the  name.   Other  variable  types  are  set  by
     concatenating  an `=' and the value.  The entire assignment must not have
     any blanks in it.  A single set command may be  used  to  interrogate  as
     well  as  set a number of variables.  Variables may be initialized at run
     time by placing set commands (without the ``~s'' prefix in a file  .tiprc
     in  one's  home directory).  The -v option causes tip to display the sets
     as they are made.   Certain  common  variables  have  abbreviations.  The
     following  is  a list of common variables, their abbreviations, and their
     default values.

               (bool) Discard unprintable characters when a session  is  being
               scripted; abbreviated be.

               (num) The baud rate at which the  connection  was  established;
               abbreviated ba.

               (num) When dialing a phone number, the  time  (in  seconds)  to
               wait for a connection to be established; abbreviated dial.

               (bool) Synchronize with the remote host during file transfer by
               waiting for the echo of the last character transmitted; default
               is off.

               (str)  The  set  of  characters  which  signify   and   end-of-
               tranmission  during  a  ~<  file  transfer command; abbreviated

               (str) The string sent to indicate end-of-transmission during  a
               ~> file transfer command; abbreviated eofw.

               (str) The set of characters which indicate an end-of-line.  Tip
               will recognize escape characters only after an end-of-line.

               (char) The command prefix (escape) character;  abbreviated  es;
               default value is `~'.

               (str) The set of characters which should not be  discarded  due
               to  the beautification switch; abbreviated ex; default value is

               (char) The character used to force literal  data  transmission;
               abbreviated fo; default value is `^P'.

               (num) The amount of data (in  bytes)  to  buffer  between  file
               system writes when receiving files; abbreviated fr.

               (str) The  name  of  the  host  to  which  you  are  connected;
               abbreviated ho.

               (char) The character which indicates  and  end-of-line  on  the
               remote host; abbreviated pr; default value is `\n'.  This value
               is used to synchronize during data  transfers.   The  count  of
               lines  transferred  during  a file transfer command is based on
               recipt of this character.

               (bool) Upper case mapping mode; abbreviated ra;  default  value
               is off.  When this mode is enabled, all lower case letters will
               be mapped to upper case by tip for transmission to  the  remote

               (char) The input character used to toggle  upper  case  mapping
               mode; abbreviated rc; default value is `^A'.

               (str) The name of  the  file  in  which  a  session  script  is
               recorded; abbreviated rec; default value is ``tip.record''.

               (bool) Session scripting mode; abbreviated sc; default is  off.
               When  script is true, tip will record everything transmitted by
               the remote machine in  the  script  record  file  specified  in
               record.   If  the  beautify  switch is on, only printable ASCII
               characters  will  be  included  in  the  script   file   (those
               characters  betwee  040  and 0177).  The variable exceptions is
               used to indicate characters  which  are  an  exception  to  the
               normal beautification rules.

               (bool) Expand tabs to spaces during file transfers; abbreviated
               tab; default value is false.  Each tab is expanded to 8 spaces.

               (bool) Verbose mode; abbreviated verb; default is  true.   When
               verbose  mode  is  enabled,  tip prints messages while dialing,
               shows the current number of lines  transferred  during  a  file
               transfer operations, and more.

               (str) The name of the shell to use for the ~! command;  default
               value is ``/bin/sh'', or taken from the environment.

               (str) The home directory to use for  the  ~c  command;  default
               value is taken from the environment.

     /etc/remote              global system descriptions
     /etc/phones              global phone number data base
     ${REMOTE}                private system descriptions
     ${PHONES}                private phone numbers
     ~/.tiprc                 initialization file.
     /usr/spool/uucp/LCK..*   lock file to avoid conflicts with uucp

     Diagnostics are, hopefully, self explanatory.

     remote(5), phones(5).

     The full set of variables is undocumented and should, probably, be paired